PT Cruiser L4-2.4L Turbo VIN 8 (2005)
A new Compass/Temp Mirror is shipped in a first time calibration mode. CAL is illuminated when the Compass/Temp Mirror is first powered up. The
first time calibration mode can not be exited until the first time calibration process is completed. The CAL icon will remain illuminated to alert the driver
that the Compass/Temp Mirror is operating in the CAL mode. Move the vehicle to an area away from large metallic objects or overhead power lines.
While CAL is illuminated in the display the vehicle must be driven in 3 complete 360 degree circles at less than 5 MPH (8 KPH). The compass will
calibrate; CAL will turn off, and then resume normal operation.
MANUAL CALIBRATION
With the ignition in the ON position, pressing and holding the Zone/Cal button (left reading lamp button) for 10-15 seconds will toggle the display to
CAL. Releasing the button within the 10-15 second duration will enter the compass into the calibration mode. CAL will remain illuminated until the
calibration is complete or is toggled off by pressing the Zone/Cal button. Move the vehicle to an area away from large metallic objects or overhead
power lines. While CAL is illuminated in the display the vehicle must be driven in 3 complete 360 degree circles at less than 5 MPH (8 KPH). The
compass will calibrate; CAL will turn off, and then resume normal operation.
CONTINUOUS CALIBRATION
During normal operation, the Compass/Temp Mirror will continuously update the compass calibration to adjust for gradual changes in the vehicle's
magnetic remnant field. If the vehicle is subjected to high magnetic influences, the compass may appear to indicate false headings or appear unable to be
calibrated. If this occurs the vehicle may need to be demagnetized. Refer to Demagnetizing Procedure.
SELF-CHECK DIAGNOSTICS
With the ignition ON, the Compass/Temp Mirror can perform a diagnostic self-check by pressing and holding the Zone/Cal button (left reading lamp
button) for 20-25 seconds. The internal diagnostics will sequence the following five tests:
1. VF segment display - Illuminates the segment patterns one at a time for 1 second each as follows: CAL; ZONE; N; NE; E; SE; S; SW; W; NW; 0
through 9; C°; F°
2. CTM memory-ROM Checksum
3. CTM memory-RAM
4. CTM memory-EEPROM
5. Compass Test
During the self-check, if any of the internal tests fail, the Compass/Temp Mirror will display an "F" and the number of the test that failed. If more than
one test fails "FO" will be displayed. P-Pass or F-Fail will be displayed until the Zone/Cal button (left reading lamp button) is pressed and released or the
ignition is cycled. If all of the tests pass, the Compass/Temp Mirror will display "P". A VF segment that fails to illuminate will not cause the
Compass/Temp Mirror to display an "F". If any segment fails to illuminate or the Compass/Temp Mirror displays "F", the Compass/Temp Mirror must
be replaced.
To exit self-check diagnostics, press and release the Zone/Cal button or cycle the ignition to return to normal compass/temp operation.
OUTSIDE TEMPERATURE
The Compass/Temp Mirror utilizes vehicle speed and engine temperature data received on the PCI Bus to accurately display the outside temperature to
